/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:07:21,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:07:21,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:07:21,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:07:21,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:07:21,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:07:21,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:07:21,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:07:21,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:07:21,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:07:21,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:07:21,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:07:21,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:07:21,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:07:21,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:07:21,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:07:21,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:07:21,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:07:21,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:07:21,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:07:21,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:07:21,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:07:21,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:07:21,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:07:21,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:07:21,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:07:21,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:07:21,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:07:21,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:07:21,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:07:21,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:07:21,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:07:21,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:07:21,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:07:21,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:07:21,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:07:21,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:07:21,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:07:21,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:07:21,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:07:21,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:07:21,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:07:21,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:07:21,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:07:21,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:07:21,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:07:21,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:07:21,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:07:21,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:07:21,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:07:21,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:07:21,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:07:21,440 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:07:21,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:07:21,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:07:21,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:07:21,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:07:21,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:07:21,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:07:21,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:07:21,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:07:21,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:07:21,443 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:07:21,443 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:07:21,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:07:21,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:07:21,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:07:21,697 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:07:21,699 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:07:21,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-11 02:07:21,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f903f85/9bb62e41098241e09540d3179441739f/FLAG3086fa4d6 [2022-01-11 02:07:22,157 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:07:22,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-11 02:07:22,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f903f85/9bb62e41098241e09540d3179441739f/FLAG3086fa4d6 [2022-01-11 02:07:22,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f903f85/9bb62e41098241e09540d3179441739f [2022-01-11 02:07:22,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:07:22,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:07:22,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:07:22,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:07:22,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:07:22,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac48da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22, skipping insertion in model container [2022-01-11 02:07:22,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:07:22,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:07:22,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-01-11 02:07:22,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:07:22,349 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:07:22,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-01-11 02:07:22,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:07:22,370 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:07:22,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22 WrapperNode [2022-01-11 02:07:22,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:07:22,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:07:22,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:07:22,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:07:22,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,393 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-01-11 02:07:22,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:07:22,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:07:22,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:07:22,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:07:22,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:07:22,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:07:22,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:07:22,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:07:22,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:07:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:22,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 02:07:22,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 02:07:22,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:07:22,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:07:22,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:07:22,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:07:22,531 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:07:22,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:07:22,614 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:07:22,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:07:22,619 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 02:07:22,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:22 BoogieIcfgContainer [2022-01-11 02:07:22,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:07:22,621 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:07:22,621 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:07:22,623 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:07:22,625 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:22" (1/1) ... [2022-01-11 02:07:22,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:07:22 BasicIcfg [2022-01-11 02:07:22,665 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:07:22,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:07:22,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:07:22,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:07:22,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:07:22" (1/4) ... [2022-01-11 02:07:22,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749cf325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:07:22, skipping insertion in model container [2022-01-11 02:07:22,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:22" (2/4) ... [2022-01-11 02:07:22,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749cf325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:07:22, skipping insertion in model container [2022-01-11 02:07:22,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:22" (3/4) ... [2022-01-11 02:07:22,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749cf325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:07:22, skipping insertion in model container [2022-01-11 02:07:22,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:07:22" (4/4) ... [2022-01-11 02:07:22,671 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.cTransformedIcfg [2022-01-11 02:07:22,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:07:22,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:07:22,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:07:22,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 02:07:22,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:07:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:07:22,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:22,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:07:22,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1953496264, now seen corresponding path program 1 times [2022-01-11 02:07:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:22,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993960701] [2022-01-11 02:07:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:22,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:22,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:22,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993960701] [2022-01-11 02:07:22,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993960701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:22,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:07:22,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:07:22,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641754239] [2022-01-11 02:07:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:22,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:07:22,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:07:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:07:22,966 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:22,976 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-01-11 02:07:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:07:22,980 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:07:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:22,991 INFO L225 Difference]: With dead ends: 21 [2022-01-11 02:07:22,991 INFO L226 Difference]: Without dead ends: 9 [2022-01-11 02:07:22,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:07:22,997 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:22,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-11 02:07:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-11 02:07:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-01-11 02:07:23,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-01-11 02:07:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-01-11 02:07:23,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-01-11 02:07:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:07:23,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:23,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:07:23,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:07:23,036 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1953526055, now seen corresponding path program 1 times [2022-01-11 02:07:23,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:23,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922177452] [2022-01-11 02:07:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:23,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:23,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:23,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922177452] [2022-01-11 02:07:23,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922177452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:23,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:07:23,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:07:23,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785104768] [2022-01-11 02:07:23,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:07:23,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:23,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:07:23,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:07:23,144 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:23,164 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-01-11 02:07:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:07:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:07:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:23,165 INFO L225 Difference]: With dead ends: 19 [2022-01-11 02:07:23,165 INFO L226 Difference]: Without dead ends: 12 [2022-01-11 02:07:23,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:07:23,167 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-11 02:07:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-01-11 02:07:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-11 02:07:23,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-01-11 02:07:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:23,171 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-11 02:07:23,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-11 02:07:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:07:23,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:23,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:23,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:07:23,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1634255214, now seen corresponding path program 1 times [2022-01-11 02:07:23,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:23,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246123407] [2022-01-11 02:07:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:23,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:07:23,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246123407] [2022-01-11 02:07:23,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246123407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:23,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:07:23,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 02:07:23,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109147601] [2022-01-11 02:07:23,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:23,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:07:23,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:07:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:07:23,285 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:23,345 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-01-11 02:07:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:07:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-11 02:07:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:23,347 INFO L225 Difference]: With dead ends: 18 [2022-01-11 02:07:23,347 INFO L226 Difference]: Without dead ends: 14 [2022-01-11 02:07:23,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:07:23,353 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:23,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-11 02:07:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-11 02:07:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-11 02:07:23,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-11 02:07:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:23,362 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-11 02:07:23,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-11 02:07:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 02:07:23,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:23,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:23,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:07:23,365 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash -734404824, now seen corresponding path program 1 times [2022-01-11 02:07:23,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:23,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095435399] [2022-01-11 02:07:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:23,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:23,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:23,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095435399] [2022-01-11 02:07:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095435399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176342551] [2022-01-11 02:07:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:23,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:23,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:23,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:07:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 02:07:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:07:23,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:07:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176342551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:23,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:23,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-11 02:07:23,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251389337] [2022-01-11 02:07:23,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:23,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 02:07:23,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 02:07:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:07:23,833 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:24,071 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-11 02:07:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-11 02:07:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 02:07:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:24,072 INFO L225 Difference]: With dead ends: 43 [2022-01-11 02:07:24,073 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 02:07:24,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-01-11 02:07:24,074 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:24,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:07:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 02:07:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-01-11 02:07:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-11 02:07:24,084 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2022-01-11 02:07:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:24,084 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-11 02:07:24,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-11 02:07:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 02:07:24,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:24,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:24,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:24,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:24,314 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1482127929, now seen corresponding path program 2 times [2022-01-11 02:07:24,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923175062] [2022-01-11 02:07:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:24,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 02:07:24,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923175062] [2022-01-11 02:07:24,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923175062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815948108] [2022-01-11 02:07:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:07:24,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:24,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:24,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:24,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:07:24,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:07:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 02:07:24,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 02:07:29,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 02:07:29,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815948108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:29,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:29,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2022-01-11 02:07:29,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466867685] [2022-01-11 02:07:29,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:29,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-11 02:07:29,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-11 02:07:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=122, Unknown=1, NotChecked=0, Total=182 [2022-01-11 02:07:29,421 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:29,677 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-01-11 02:07:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 02:07:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-11 02:07:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:29,679 INFO L225 Difference]: With dead ends: 57 [2022-01-11 02:07:29,679 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 02:07:29,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2022-01-11 02:07:29,680 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:29,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-11 02:07:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 02:07:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-01-11 02:07:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-11 02:07:29,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-01-11 02:07:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:29,686 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-11 02:07:29,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-11 02:07:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-11 02:07:29,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:29,687 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:29,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:29,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1296830382, now seen corresponding path program 3 times [2022-01-11 02:07:29,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506658037] [2022-01-11 02:07:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:29,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 62 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 02:07:30,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506658037] [2022-01-11 02:07:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506658037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685037013] [2022-01-11 02:07:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:07:30,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:30,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:30,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:07:30,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-11 02:07:30,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 02:07:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 02:07:30,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 02:07:30,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685037013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:30,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:30,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-11 02:07:30,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292935434] [2022-01-11 02:07:30,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:30,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 02:07:30,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 02:07:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-11 02:07:30,696 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:31,894 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-01-11 02:07:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-11 02:07:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-11 02:07:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:31,896 INFO L225 Difference]: With dead ends: 91 [2022-01-11 02:07:31,896 INFO L226 Difference]: Without dead ends: 63 [2022-01-11 02:07:31,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-01-11 02:07:31,898 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:31,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 101 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 02:07:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-11 02:07:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-01-11 02:07:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-01-11 02:07:31,906 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 33 [2022-01-11 02:07:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:31,906 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-01-11 02:07:31,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-01-11 02:07:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-11 02:07:31,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:31,908 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:31,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:32,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:32,112 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2117685255, now seen corresponding path program 4 times [2022-01-11 02:07:32,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:32,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522459085] [2022-01-11 02:07:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:32,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 193 proven. 57 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-11 02:07:32,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522459085] [2022-01-11 02:07:32,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522459085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946895472] [2022-01-11 02:07:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:07:32,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:32,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:07:32,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:07:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-11 02:07:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-11 02:07:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-11 02:07:33,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946895472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:33,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:33,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 34 [2022-01-11 02:07:33,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095867819] [2022-01-11 02:07:33,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:33,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-11 02:07:33,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-11 02:07:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-01-11 02:07:33,572 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:48,188 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2022-01-11 02:07:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-11 02:07:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-11 02:07:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:48,189 INFO L225 Difference]: With dead ends: 166 [2022-01-11 02:07:48,189 INFO L226 Difference]: Without dead ends: 108 [2022-01-11 02:07:48,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1701, Invalid=5609, Unknown=0, NotChecked=0, Total=7310 [2022-01-11 02:07:48,193 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 402 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:48,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 341 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-11 02:07:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-11 02:07:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-01-11 02:07:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2022-01-11 02:07:48,208 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 54 [2022-01-11 02:07:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:48,209 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-01-11 02:07:48,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2022-01-11 02:07:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-11 02:07:48,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:48,211 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:48,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:48,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1335670578, now seen corresponding path program 5 times [2022-01-11 02:07:48,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538892355] [2022-01-11 02:07:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:48,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-11 02:07:48,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538892355] [2022-01-11 02:07:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538892355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121592218] [2022-01-11 02:07:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 02:07:48,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:48,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:48,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process